Travel not only benefits marriages, but relationships in general. Whether it's love relationships, family, or friends, travel allows you to develop better levels of communication with the people around you. Also, you will be able to meet many people from all around the world who could become lifelong friends.
Family relationships are also greatly enhanced by travel, especially with children. Children have a very high learning capacity, therefore, everything they learn in their childhood will form a large part of their future. In this sense, travel will allow children to develop from an early age many important skills concerning the way they view life.